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The multiple of three consecutive odd numbers equals 315. Which of hte following is the correct equation for y if y is the greatest number among the three? A. y的3次方+3y的2次方+2y-315=0 B. y的3次方-3y的2次方+2y-315=0 C. y的3次方+6y的2次方+8y-315=0 D. y的3次方 -6y的2次方+8y-315=0

 

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最佳解答:

The multiple of three consecutive odd numbers equals 315. Which of the following is the correct equation for y if y is the greatest number among the three? Let y be the greatest number among the three y( y-2 )( y-4 ) = 315 ( y2 - 2y )( y - 4 ) = 315 y2( y - 4 ) - 2y( y - 4 ) = 315 y3 - 6y2 + 8y = 315 y3 - 6y2 + 8y - 315 = 0 Therefore, D is the correct answer 2007-03-11 15:07:34 補充: 樓上果位朋友, y 係最大的 number, 點會係 y( y+2 )( y+4 )呀?你條式係用於當 y 係最小的 number的時候~

其他解答:

A. y的3次方+3y的2次方+2y-315=0 B. y的3次方-3y的2次方+2y-315=0 C. y的3次方+6y的2次方+8y-315=0 D. y的3次方 -6y的2次方+8y-315=00D7DAC4E7B8CAAC5
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